K&N Performance Cold Air Intake Kit 57-3514 with Lifetime Filter for 2000-2008 Honda S2000 2.0L/2.2L Estimated horsepower gain of 9.56 HP at 6400 RPM Designed to improve throttle response and engine sound Lasts up to 100,000 miles before service is required (depending on driving conditions) Replaces entire factory air intake system Easy to install, usually in 90 minutes or less